Chosen Solution

Actually, that answer does not explain how to use the feature. Here are some steps.

Open a new tab

In the address bar, type about:config

Hit Enter

Accept the warning

Search for browser.newtabpage.columns

Double click the first result

Change the value to the number of columns you would like to see on the new tab page

Hit OK

Search for browser.newtabpage.rows

Double click the first result

Change the value to the number of rows you would like to see on the new tab page

Hit OK

Actually, that answer does not explain how to use the feature. Here are some steps.
# Open a new tab
# In the address bar, type '''about:config'''
# Hit '''Enter'''
# Accept the warning
# Search for '''browser.newtabpage.columns'''
# Double click the first result
# Change the value to the number of columns you would like to see on the new tab page
# Hit '''OK'''
# Search for '''browser.newtabpage.rows'''
# Double click the first result
# Change the value to the number of rows you would like to see on the new tab page
# Hit '''OK'''